Attaching plug



ATTACHING PLUG Filed Aug. 1l 192] April 26, 192'?.

-a' 291m, @mi

j fzrnoms n rnvizic, or rqnxrowii Erreurs-NEW vom.

Mamme Prine. I

. applicati@ mea migas: ii, i921. serai no. 491,.

My invention relates ,to'improvements in, I' electrical attachment plugs, and the samehas for l,its object more particularly to pro- 1 vide a plug in which the contact terminals A s may engage throughout their entire length with the element adapted to be inserted into the' same.

- Further,'said invention has for its objectv l 'to provide a plug iii which the contact terl In lminals are' eachl composed of a pair of jaws 1f which Y areadapted f to contact throughout their lentire length-with the contact pin or blade adapted to be -inseri'cd between the same. 4 llil Further, said invention has for its object to provide a plugin which each contact teriminal comprises a rigid member, and-a member bodily movable with respect thereto when a contact element is introduced therebetween..- 20 Further, said'invention has lfor its object to -providea plug in which each contact member comprises a rigid jaw and a movable f 'aw' whi ch is engaged,intermediate its ends y said lixed jawand has itsI opposite ends 25 free to mov' with respect to said fixed jaw.

Further, said invention has for -its object to provide a plug in which vveach contact 4- member comprises a rigid jaw, 'and a bodily yielding jaw which are Aso arranged that the insertion of a cooperating contact element will, at rst, be resisted by a comparatively small degree of pressure, and thereafterv by a graduallyl increasing pressure until the 'same is fully in position between said' jaws.l

Further, said invention has for its object l to providea plug in which the several parts .of the contact terminal or member `may be readily assembled'and held in place by a single screw or the like which also serves to lsecureone` end ofa conductor thereto. v Further, said'f vention has for vits object to provide a'plugin which the contact terminals or members 4are adapted, without change or alteration, to receive and hold a cooperating Contact element which ma be either cylindrical or Hat, or substantiall cylindrical or at. in form.-

Other objects will in part be obvious and in part be pointed out hereinafter.-

and ends, my invention consists'inrthenoveldetails of construction, and in the 'combinae tion, connection and arrangement" of parts hereinafter more fully' described and then c5 pointed out in the claims. f

To the attainment ofthe aforesaid objects.

In the accompanying drawings wherein. like numerals of reference 'indicate like parts' gure 1 'is a face' view, partly broken away,

showing vone form ofattachment plug conto structed according to, and embodying my said invention, the said view showing 'one contact terminal or member in plan or face view; v

Fig. 2 is a side elevation of one contact termi minal or member, showing the positions of the several'parts; when a removable contact member of cylindrical form is being inserted -into the saine.

Fig. 3 is a similar-view showing the re- 70 `movable contact member fully inhposition and engaged by theajaws of the contact terminal or member of the plug;

"Fig. 4 is a cross-section on the line 4 4 of Eig.' 3;- and Fig. 5 isa similar view showing the jaws ofl said contact terminal embracing a dat removable. contact element.

In said drawings 10 designates a casing, made of suitable insulating material, andi B preferably comprising a base 11 and a cover 12 corresponding in outline thereto. The base 11 and cover 12 are provided in their opposing faces with registering recesses 13 corresponding in outline with the general t5 contour of the contact terminals or members 14 adapted to be maintained in separated relation therein when saidv arts 11 and 12 are secured in assembled position by bolts 15 and nuts 16. l

' Each contact terminal or member 14 comprises a longitudinally grooved plate 17 having a flaring forward end 18 and a Hat rear substantially rectangular end 19 pro-A vided along its sides with upwardly projectas ing flanges 20, and with upwardly extending ears 21. A

The longitudinally grooved plate 17 Y.is provided at its opposite longitudinal edges with flat, laterally extendin Aflanges 22. 23 denotes a pair of space projections arranged adjacent tothe -forward end of the plate-17 and extending upwardly from the `Outer edges of the anges 22.

24denotesa shorter'longitudinally-grooved los i (plate having a flaring forward end 25 corvrespondingtothe Haring forward end 18 of plate 17, and having its rear end slightly rounded atf25, The said grooved plate-2d is also vprovided along its Aopposite longitu- B of 'the lower grooved plate 17, and at its opposite edgesmidway between its ends said plate 24 is provided with lateral projections 27 adapted to be loosely received intermediate each pair ofvspaced projections 2 3 in order to maintain said plate 24 duly positioned against longitudinal movement withl respect to the plate 17. 1

28 denotes a flat spring having its rear end disposed intermediate the flanges'20 and the ears 21 on the rear'end 19V of the late 17, and secured in position thereon by t e screw 29 and washer 30 which serve to hold one end of an electricconductor 31 secured to said contact terminal 14.' The forward portion of the flat spring 28 extends .upwardly and forwardly and has its free end in contact .with the upper side of the movable plate 24 at about a point coinciding with a line drawn at right angles to the longitudinal axis of said plate, 24 and extending centrally through the projections 27 thereon.v

The free end of the spring 28 serves to hold the movable plate 24 in position upon the plate 17, and to yieldingly resist all vertical movement with respect thereto. v

y The operation of the device is largely ob-` vious. It is to be noted,.however, that when the end of a cooperating or detachable contact element, as, for example, a c lindrical pin 32 is first introduced between t e flaring ends 18 25 of said plates 17, 24, respectively, only a slight inward pressure is necessary, as the movable plate 24 in-pivoting a ainst the free end of the spring 28 only slightly opposes or resists the insertion of the end of said contact pin 32. This resistance to the inward movement' of the contact plin 32 gradually increases until the endV thereof passes the point under the forward end of the spring 28 vby which time the plates 17 24 will be brought into parallelism, and into full'engag'ement with the pin 32. t

Further, it is to benoted that where the contact element 33 to be received intermediate the platesvl, 24 is flat or of tapering but that the same may be employed in all types of electric apparatus in which` one set of contact members is carried by such' apparatus and adapted to receive a cooperating contact element forming` part 4of or con-vq nected to another cooperating device -or apparatus. i

Having thus described my said invention what I claim and desire to secure by Letters Patent is: f

y1. 'A device of the character described 'comprising a rigid plate having a/longitudmal groove therein, guides extendmg up-v Awardlfy from the opposite edges of said plate, a movable plate having a longitudinal groove therein registering with the groove' insaid rigid plate, projections on the opposite edges ot said movable plate and working within said guides, and a spring secured at one end to said rigid plate and having its free end engaging said movable plate at a point about midway between the ends of said movable plate, substantially asv specified.

2. A device of the character described comprisinga rigid plate having a longitudinal'groove therein, longitudinal flanges eX-,

tending laterally from each side of said groove, va pair of guides extending upwardly t from the opposite outer edges of said longitudinalv yflanges, a movable platehaving a longitudinal groove therein registering with the groove in said .rigid plate, longitudinal flanges extending laterally from the opposite edges of said groove, projections extending outwardly from the outer edges of said longitudinal anges midway'o the length of said movable plate and workingv within the guides on said rigid plate and a spring secured at one end to one en of said rigid plates and having its other end extending forwardly' and engaging said movable plate at a point agout midway between the ends pifaid mova le plate, substantiallyas speci- 3; A4 device of the` character described'y comprising a rigid plate having a longitudinal groove therein, longitudinal flanges extending laterally from each sideof said groove, a pair of guides extending upwardly from the opposite outer edges of said longitudinal flanges, a movable plate having' a longitudinal groove therein registering with the groovein said :rigid plate, longitudinal flanges extending laterally from the opposite edges of said groove,.said ri id and said movable plates being adapte different' cross-sectional configurations, prof jections extending outwardly'froin the outer edges of said longitudinal flanges midway -of the length of said movable plate and ing said movable plate at a point about mi way between its ends, substantiallycas specilied. l

4. A device'` of the character-delscribed.

comprising a. rigidy plate having a longitudinal groove therein, longitudinal flanges extending laterally from each side pf2- said to receive therebetween removable contact members "of oove, a pair of guides extending upwardly om the opposite outer edges of said longitudinal flanges, a movable plate having a longitudinal groove therein registering with the groove in said rigid plate, lon 'tudinal flanges extending laterally from e opposite edges of said groove, projections` extending outwardlly from the outer edges of said lou 'tudina flan midway of` the length o said late an working within the guides on sai rigid plate, a spring, and means for securing sai contact device to a conductor; said means 'also servin to secure said spring to said rigid plate, su stantially as specified.

5. A device of the character describedcomprising a rigid plate having a longitudinal groove therein, longitudinal ilanges extending laterall from each side of said groove, a pair o guides extending upwardly from the opposite outer edges of said longitudinal flanges; said rigid plate terminating' in a flat end having upwardly extending flanges at its opposite sides, having a longitudinal groove therein and a movable plate longitudinal flanges extending 'laterally from within the guides on said rigid plate, a

spring having diie end disposed'upon the flat end of said rigid plate intermediate the upwardly extending flanges thereon, and its other end free andengagin said movableplate midway between its en s, and a screw extending through said Erst-mentioned end of said spring and the flat end of said rigid plate for securin to a conductor su stantially as specified.l

Signed at t e city of New York, in the county and State of New York, this 29th day of July, one thousand nine hundred and twenty-one.

a f oms D. Fi'NIzvio.

said parts together and 

